GE Multilin MIWII Instruction Manual page 207

APPENDIX C
APPENDIX C APPLICATION NOTESC.1TRIP CIRCUIT SUPERVISION FOR MII-FAMILY RELAYS
MII Family relays can be used to monitor Trip circuit integrity. The circuit is basically a Voltage Monitor connected to
contact 52a. The circuit is continuously monitoring the voltage level. The circuit below is designed to monitor the complete
trip circuit. It includes the tripping coil of the breaker and the trip circuit, the wiring between the relays, and the circuit
breaker.
An alarm can be issued when the circuit is open. The figure below shows the typical wiring diagram that will provide trip
circuit monitoring while the circuit breaker is closed.
+Vdc
TRIP
GEK-113308
C.1 TRIP CIRCUIT SUPERVISION FOR MII-FAMILY RELAYS
Breaker
Auxiliary
Contact (52a)
TRIP COIL
MIWII Directional Power Protection System
A5
TRIP
A6
A8
INP#1
A9 INP#2
A10
COM
C
C-1